From 5234f5eb04abbbfa306ccfbc2ccbb6e73f515b15 Mon Sep 17 00:00:00 2001 From: Eric W. Biederman Date: Sat, 25 Jun 2005 14:58:02 -0700 Subject: [PATCH] kexec: x86_64 kexec implementation This is the x86_64 implementation of machine kexec. 32bit compatibility support has been implemented, and machine_kexec has been enhanced to not care about the changing internal kernel paget table structures. From: Alexander Nyberg build fix Signed-off-by: Eric Biederman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-x86_64/kexec.h | 28 ++++++++++++++++++++++++++++ include/asm-x86_64/unistd.h | 2 +- 2 files changed, 29 insertions(+), 1 deletion(-) create mode 100644 include/asm-x86_64/kexec.h (limited to 'include') diff --git a/include/asm-x86_64/kexec.h b/include/asm-x86_64/kexec.h new file mode 100644 index 000000000000..dc33646dc7dd --- /dev/null +++ b/include/asm-x86_64/kexec.h @@ -0,0 +1,28 @@ +#ifndef _X86_64_KEXEC_H +#define _X86_64_KEXEC_H + +#include +#include + +/* + * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return. + * I.e. Maximum page that is mapped directly into kernel memory, + * and kmap is not required. + * + * So far x86_64 is limited to 40 physical address bits. + */ + +/* Maximum physical address we can use pages from */ +#define KEXEC_SOURCE_MEMORY_LIMIT (0xFFFFFFFFFFUL) +/* Maximum address we can reach in physical address mode */ +#define KEXEC_DESTINATION_MEMORY_LIMIT (0xFFFFFFFFFFUL) +/* Maximum address we can use for the control pages */ +#define KEXEC_CONTROL_MEMORY_LIMIT (0xFFFFFFFFFFUL) + +/* Allocate one page for the pdp and the second for the code */ +#define KEXEC_CONTROL_CODE_SIZE (4096UL + 4096UL) + +/* The native architecture */ +#define KEXEC_ARCH KEXEC_ARCH_X86_64 + +#endif /* _X86_64_KEXEC_H */ diff --git a/include/asm-x86_64/unistd.h b/include/asm-x86_64/unistd.h index 3c9af6fd4332..d767adcbf0ff 100644 --- a/include/asm-x86_64/unistd.h +++ b/include/asm-x86_64/unistd.h @@ -552,7 +552,7 @@ __SYSCALL(__NR_mq_notify, sys_mq_notify) #define __NR_mq_getsetattr 245 __SYSCALL(__NR_mq_getsetattr, sys_mq_getsetattr) #define __NR_kexec_load 246 -__SYSCALL(__NR_kexec_load, sys_ni_syscall) +__SYSCALL(__NR_kexec_load, sys_kexec_load) #define __NR_waitid 247 __SYSCALL(__NR_waitid, sys_waitid) #define __NR_add_key 248 -- cgit v1.2.3